Since this topic is popular -
https://bitcointalk.org/index.php?topic=890086.0You guys should be interested in similar concept at btccharts.
Of course its all automated.
At start you get 10 units of traded asset (like 10btc).
And then you sell or buy all in with one click (executed on current orderbook).

All trades are public.


You can even enable displaying of buy/sell arrows of specified trader on chart.

Currently mostly pizzasalami is rocking there (80 percentage points of profit last 30 days) but I hope this will get more popular

If you don't have flash on browser there's always desktop version -
http://btccharts.com/forum/index.php?topic=305.0